Now to raise some controversy, Niemoller's response to Nazism can be summed up as:
Initial support, then discover it is not Christian.
Make loud noise which eventually lands him in a concentration camp hereby neutralizing him for the rest of the war.
Postwar, have guilt fit, inflict it on the rest of Germany and try to work it off by aiding the Soviet Union and North Vietnam.
Write silly poem, forgetting that if you do not come for the Communists, they will come for you.
Contrast with Bonhoeffer, who after some initial open resistance and some interesting anti-Nazi theological writing, joins the Abwehr, supposedly volunteering to monitor anti-Nazi activity, but really to cover his own resistance work, which IIRC includes rescue work, passing on info to the Allies and participating in the July 1944 attempt at a coup. For his efforts, he is tortured and is among the people hung on a meathook by the Nazis.